TWI231934B - Playing device for compact disc - Google Patents
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- TWI231934B TWI231934B TW091115425A TW91115425A TWI231934B TW I231934 B TWI231934 B TW I231934B TW 091115425 A TW091115425 A TW 091115425A TW 91115425 A TW91115425 A TW 91115425A TW I231934 B TWI231934 B TW I231934B
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- optical disc
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10305—Improvement or modification of read or write signals signal quality assessment
- G11B20/10398—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors
- G11B20/10425—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors by counting out-of-lock events of a PLL
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
五、發明說明（1) 發明之詳細說明 【發明所屬之技術領域】 本發明係有關於光碟再生裝置，特別是，有關於爲 了達到高密度紀錄化，將資料記錄於陸地部與溝槽部雙 方上之光碟之再生機構上，無關於陸地部與溝槽部其再 生特性之不同，以達到提高等化信號品質之發明。 【習知技術】V. Description of the invention (1) Detailed description of the invention [Technical field to which the invention belongs] The present invention relates to an optical disc reproduction device, and more particularly to recording data on both the land portion and the groove portion in order to achieve high-density recording. In the reproduction mechanism of the above optical disc, there is nothing about the difference between the reproduction characteristics of the land portion and the groove portion to achieve the invention of improving the quality of the equalized signal. [Learning technology]
在以往，光碟再生裝置中之濾波器係數更新機構， 例如特開平2000-123487號所記載般，將透過暫時判定 機構產生之暫時資料判定輸出與在濾波器中受到等化之 輸出信號之差作爲等化誤差信號，然後使此等化誤差信 號之均方爲最低般將濾波器係加以更新，由此可提高等 化信號品質般地加以構成。In the past, the filter coefficient updating mechanism in an optical disc reproduction device, as described in Japanese Patent Application Laid-Open No. 2000-123487, used the difference between the temporary data judgment output generated by the temporary judgment mechanism and the output signal equalized in the filter as the difference. By equalizing the error signal and then updating the filter system such that the mean square of the equalized error signal is minimized, the quality of the equalized signal can be improved.
但是，隨著近幾年來資訊量的增加，光碟被寄望高 密度紀錄化，係利用將資訊紀錄於如第9圖所示般設置 於光碟上之記憶領域900之溝狀之溝槽部901，以及該 溝間之陸地部902之陸地/溝槽紀錄方式。由該圖可得 知，由於溝槽部90 1與陸地部902之間會產生物理性之 高低差，所以，因反射光的不同紀錄資料之再生信號特 性亦會不同。因此，在僅擁有進行數位等化使濾波器之 等化誤差成爲最小般地加以控制的一個濾波器係數學習 機構之習知技術中，會有無法對應溝槽部90 1與陸地部 902其再生信號特性不同之問題發生。 五、發明說明（2) 【發明所欲解決之問題】 習知之光碟再生裝置乃是如以上所述加以構成’在 將由陸地/溝槽紀錄方式所紀錄之光碟加以再生之際， 存在無法精確地控制因反射光的不同所導致之信號特性 之差異之問題。 本發明係有鑑於前述之問題點，提供光碟再生裝置 在使用朝向高密度紀錄化之陸地/溝槽紀錄方式之光 碟，對應陸地部與溝槽部之再生信號特性的不同而能夠 進行適當之波形等化之爲目的。 【解決問題之方法】 本發明申請專利範圍第1項所述之光碟再生裝置， .乃是備有將紀錄於光碟之陸地部與溝槽部之資訊加以再 生之再生機構；可將濾波器係數變換成將由再生機構所 再生之再生信號透過類比·數位轉換器加以轉換所獲得 之多位元數位信號而進行數位等化之濾波器；辨識陸地 部與溝槽部而產生切換信號之切換信號產生機構；將輸 入於濾波器內之前述濾波器係數，分別就陸地部與溝槽 部其等化誤差成爲最小地適當地加以控制之濾波器係數 學習機構。 本發明申請專利範圍第2項所述之光碟再生裝置， 乃是在申請專利範圍第1項所述之光碟再生裝置中，前 述濾波器爲非巡迴形濾波器，且備有：令透過前述類 比•數位轉換器所轉換後之多位元數位信號在每——定 -4-However, with the increase in the amount of information in recent years, the optical disc is expected to be recorded at a high density, and the information is recorded in the groove-shaped groove portion 901 of the groove 900 in the memory area 900 provided on the optical disc as shown in FIG. 9. , And the land / trench recording method of the land portion 902 between the grooves. As can be seen from the figure, since the height difference between the groove portion 90 1 and the land portion 902 is physical, the characteristics of the reproduced signal of the recorded data are different due to the reflected light. Therefore, in the conventional technique that has only one filter coefficient learning mechanism that performs digital equalization to minimize the equalization error of the filter, there is a problem that the reproduction of the groove portion 901 and the land portion 902 cannot be performed. Problems with different signal characteristics occur. V. Description of the invention (2) [Problems to be solved by the invention] The conventional optical disc reproduction device is constructed as described above. 'When reproducing the optical disc recorded by the land / groove recording method, there is no way to accurately reproduce it. Controls the difference in signal characteristics caused by different reflected light. In view of the foregoing problems, the present invention provides an optical disc reproduction device that uses a land / groove recording method for high-density recording, and can perform appropriate waveforms in accordance with the difference between the reproduction signal characteristics of the land portion and the groove portion. Equalization is for the purpose. [Method for solving the problem] The optical disc reproduction device described in item 1 of the scope of patent application of the present invention is provided with a reproduction mechanism that reproduces the information recorded on the land portion and groove portion of the optical disc; the filter coefficient can be Transformed into a filter that digitally equalizes the multi-bit digital signal obtained by converting the reproduction signal reproduced by the reproduction mechanism through an analog / digital converter; generates a switching signal that identifies the land part and the groove part and generates a switching signal Mechanism; a filter coefficient learning mechanism that appropriately controls the aforementioned filter coefficients input into the filter to minimize the equalization error between the land portion and the groove portion. The optical disc reproduction device described in item 2 of the patent application scope of the present invention is the optical disc reproduction device described in item 1 of the patent application scope. The aforementioned filter is a non-touring filter and is provided with: • The multi-bit digital signal converted by the digital converter
五、發明說明（3 ) 時間間隔加以延遲之複數個延遲元件；分別對應於前述 延遲元件分別加以設置，將前述多位元數位信號或者是 前述延遲元件之輸出作爲第1輸入，將此前述濾波器係 數學習機構所控制之濾波器係數作爲第2輸入，將第1 輸入與第2輸入加以乘算之乘算器；以及將前述多數個 乘算器之輸出加以加算之加算機構。V. Description of the invention (3) A plurality of delay elements with time intervals delayed; respectively set corresponding to the aforementioned delay elements, using the aforementioned multi-bit digital signal or the output of the aforementioned delay element as the first input, and filtering the aforementioned filtering The filter coefficient controlled by the multiplier coefficient learning mechanism is used as a second input, a multiplier that multiplies the first input and the second input; and an addition mechanism that adds the outputs of the aforementioned multipliers.
本發明申請專利範圍第3項所述之光碟再生裝置， 乃是在申請專利範圍第1項所述之光碟再生裝置中，前 述濾波器係數學習機構係備有：設定由前述濾波器之輸 出信號之等化目標値之暫時判定機構；檢測出由以前述 暫時判定機構所設定之等化目標値與前述濾波器之輸出 信號之等化誤差之等化誤差檢測機構；將·由.前述等化誤 差檢測機構所獲得之等化誤差與前述濾波器之輸出信號 之相關加以演算之相關器；將作爲前述相關器之輸出之 反饋增益加以調整之反饋增益調整機構；以及利用前述 反饋增益調整機構之輸出信號與由前述切換信號機構所 產生之切換信號，將分別對應於前述陸地部與溝槽部之 濾波器係數加以更新而輸出之濾波器係數更新機構。 又，本發明申請專利範圍第4項所述之光碟再生裝 置，乃是在申請專利範圍第3項所述之光碟再生裝置 中，前述濾波器係數更新機構係備有：收容陸地部用、 溝槽部用之初始値且針對濾波器係數所加以設置之複數 個暫存器；分別對應於前述複數個暫存器而加以設置， 五、發明說明（4) 將上述暫存器之輸出切換成由前述切換信號產生機構所 產生之切換信號，而選擇陸地部用或是溝槽部用之初始 値之第1選擇器；針對濾波器係數所加以設置之將前述 反饋增益調整機構之輸出信號加以積分之積分機構；以 及針對濾波器係數所加以設置而選擇前述積分機構之輸 出與前述第1選擇器之輸出的任何一個，作爲濾波器係 數加以輸出之第2選擇器。 又，本發明申請專利範圍第5項所述之光碟再生裝 置，乃是在申請專利範圍第4項所述之光碟再生裝置 中，具備有：與前述暫存器成對地加以設置將前述可將 個別之數値加以維持之維持暫存器；與將設置於該對暫 存器之維持暫存器之輸出與一般暫存器之輸出作爲輸 入，透過切換信號令任何一方之暫存器之信號受到輸出 般地進行輸出選擇之第3選擇器。 【發明之實施形態】 以下，將針對本發明之實施形態參照圖面加以說 明。 (第1實施形態） 利用第1圖到第5圖，說明相當於本發明之申請專 利範圍第1項到第4項所述之光碟再生裝置。 第1圖係說明第1實施形態所述光碟再生裝置100 之構成之方塊圖，光碟再生裝置100之特徵乃是透過擁 有分別對應於將以陸地/溝槽紀錄方式之光碟加以再生The optical disc reproduction device described in item 3 of the patent application scope of the present invention is the optical disc reproduction device described in item 1 of the patent application scope, and the aforementioned filter coefficient learning mechanism is provided with: setting the output signal of the aforementioned filter Temporary determination mechanism of equalization target 値; equalization error detection mechanism that detects the equalization error set by the tentative determination target 値 set by the aforementioned temporary determination mechanism and the output signal of the aforementioned filter; A correlator that calculates the correlation between the equalization error obtained by the error detection mechanism and the output signal of the aforementioned filter; a feedback gain adjustment mechanism that adjusts the feedback gain as the output of the aforementioned correlator; and a method using the aforementioned feedback gain adjustment mechanism The output signal and the switching signal generated by the switching signal mechanism are updated and output filter coefficients corresponding to the filter coefficients corresponding to the land portion and the groove portion, respectively. In addition, the optical disc reproduction device described in item 4 of the scope of patent application for the present invention is the optical disc reproduction device described in item 3 of the scope of patent application, wherein the filter coefficient update mechanism is provided with: The initial register for the slot part and a plurality of registers set for the filter coefficients are set corresponding to the aforementioned plurality of registers, respectively. V. Description of the invention (4) The output of the above register is switched to The first selector of the initial signal for the land section or the groove section is selected by the switching signal generated by the aforementioned switching signal generating mechanism; the output signal of the aforementioned feedback gain adjustment mechanism is set according to the filter coefficient setting An integration mechanism for integration; and a second selector that selects any one of the output of the integration mechanism and the output of the first selector according to the filter coefficient setting, and outputs the second selector as the filter coefficient. In addition, the optical disc reproduction device described in item 5 of the scope of patent application for the present invention is the optical disc reproduction device described in item 4 of the scope of patent application, which includes: providing a pair with the temporary register and A maintenance register that maintains individual numbers; and an output of a maintenance register and a general register that are set in the pair of registers as inputs, and a switch signal is used to make any one of the registers register The third selector selects the output as if the signal is being output. [Embodiments of the invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First Embodiment) Using FIGS. 1 to 5, an optical disc reproduction device corresponding to the items 1 to 4 of the patentable scope of the present invention will be described. FIG. 1 is a block diagram illustrating the structure of the optical disc reproduction apparatus 100 according to the first embodiment. The characteristic of the optical disc reproduction apparatus 100 is that the optical disc reproduction apparatus 100 corresponds to a land / groove recording method for reproducing the optical disc.
五、發明說明（5) 所獲得之陸地部以及溝槽部之再生信號之濾波器係數學 習機構，利用在陸地部以及溝槽部上隨時將良好之濾波 器係數設定於濾波器上之方式使等化信號之品質提昇。V. Description of the invention (5) The obtained filter coefficient learning mechanism of the reproduced signals of the land portion and the groove portion uses the method of setting a good filter coefficient on the filter at any time on the land portion and the groove portion. Improved quality of equalized signals.
光碟再生裝置100係如第1圖所示般，備有將紀錄 於光碟1 0 1之資訊加以再生之再生機構1 02、將由再生 機構1 02所再生之再生信號取樣爲多位元之數位信號之 類比•數位轉換器（AD轉換器）1 〇3、將與包含於由再生 機構1 02所再生之再生信號中之時脈成分之相位同步般 之再生時脈由振盪器輸出般第加以控制之相位同步循環 機構104、對由AD轉換器所標本化之信號進行數位等 化之濾波器1 05、將濾波器1 05之濾波器係數分別針對 陸地部以及溝槽部方面上使等化誤差變成最小而適當地 加以控制之濾波器係數學習機構1 06、產生將濾波器係 數學習機構1 06其陸地部用以及溝槽部用加以切換用之 切換信號之切換信號產生機構107。The optical disc reproduction device 100 is provided with a reproduction mechanism 1 02 for reproducing information recorded on the optical disc 1 as shown in FIG. 1, and samples a reproduction signal reproduced by the reproduction mechanism 1 02 into a multi-bit digital signal. Analogy • Digital converter (AD converter) 1 03. The reproduction clock that is synchronized with the phase of the clock component included in the reproduction signal reproduced by the reproduction mechanism 102 is controlled by the oscillator output. The phase synchronization loop mechanism 104, the digital equalization filter 1 05 for the signal normalized by the AD converter, and the filter coefficients of the filter 105 for the land portion and the groove portion, respectively, make the equalization error The filter coefficient learning mechanism 106, which is the smallest and appropriately controlled, and the switching signal generation mechanism 107, which generates switching signals for switching the land portion and the groove portion of the filter coefficient learning mechanism 106, are used.
以下，將針對第1圖中，構成光碟再生裝置100之 各區塊加以詳細說明。 AD轉換器1 03，係使用包含於相位同步循環機構 104而由振盪器所輸出之再生時脈，將由再生機構1〇2 所再生之再生信號，使其與包含於該信號之時脈成分之 相位同步而可標本化爲多位元之數位信號之轉換器。 相位同步循環機構1 04，係如第2圖所示般，由檢測 AD轉換器1 03之輸出信號之相位誤差用之相位比較器Hereinafter, each block constituting the optical disc reproduction apparatus 100 in FIG. 1 will be described in detail. The AD converter 103 uses the regeneration clock output by the oscillator included in the phase synchronization loop mechanism 104, and regenerates the regeneration signal reproduced by the regeneration mechanism 102 with the clock component included in the signal. A converter with phase synchronization that can be sampled into a multi-bit digital signal. The phase synchronization loop mechanism 1 04 is a phase comparator for detecting the phase error of the output signal of the AD converter 103 as shown in FIG. 2.
丨a 1鲈4 R丨 五、發明說明（6) 2 0 1、將由相位比較器2 0 1所輸出之相位誤差信號加以 平滑化用之循環濾波器202、以及輸出再生時脈之振盪 器203所加以構成。相位同步循環機構1 〇4，能夠將由 振盪器203所輸出之再生時脈之相位與AD轉換器之輸 出信號所具有之時脈成分之相位同步地加以控制，由 此，AD轉換器1 03之輸出信號，能夠將由再生機構 1 02所再生之再生信號，使其與包含於該信號之時脈成 分之相位同步而可標本化爲多位元之數位信號。 濾波器1 〇5係由有限分接所構成，例如FIR濾波器 (Finite Impulse response Filter有限脈衝分接回應濾波 器）。此FIR濾波器之等化特性利用使分接重疊係數（以 下稱爲濾波器係數）加以變化之方式加以實現。例如， 以7個分接之FIR濾波器爲例，如第3圖所示般，係由 使信號延遲用之延遲元件3 0 1到3 0 6，乘算元件3 0 7到 3 1 3，以及加算機構3 1 4所構成。FIR濾波器之濾波器係 數S1到S7，乃是在濾波器係數學習機構106中，其等 化誤差成爲最小地加以適當控制所獲得之濾波器係數， 由此，能夠將AD轉換器之輸出信號適當地加以等化。 前述濾波器係數學習機構106，係利用使等化誤差變 成最小般地加以適當控制之LMS計算法（Least Mean Square最小平均平方）學習濾波器係數，透過由切換信 號產生機構107所獲得之切換信號，將陸地部再生時之 濾波器係數以及溝槽部再生時之濾波器係數加以切換而 五、發明說明（7) 輸出濾波器信號之機構。濾波器係數學習機構1 06，係 如第4圖所示般，由將濾波器1 05之輸出作爲輸入信 號，由該輸入信號中檢測出等化目標値之暫時判定機構 機構40 1、由等化目標値與輸入信號中檢測出等化誤差 之等化誤差檢測機構402、將等化誤差檢測機構402之 輸出信號與輸入信號之相關加以演算之相關器403、將 相關器403輸出信號之反饋增益加以調整之反饋增益調 整機構404、以及透過切換陸地部以及溝槽部之切換信 號，分別將陸地部用以及溝槽部用之濾波器係數加以更 新後輸出之各別濾波器係數更新機構405所構成。 在此，利用第5圖，針對前述濾波器係數更新機構 405再加以詳細說明。在第5圖中，暫存器501到507 爲記憶陸地部用濾波器係數之初始値之暫存器，暫存器 508到514爲記憶溝槽部用濾波器係數之初始値之暫存 器。陸地部與溝槽部用濾波器係數之初始値，係將切換 陸地部與溝槽部之切換信號輸入選擇器530到536(第1 選擇器），透過該切換信號，輸出陸地部與溝槽部用濾 波器係數之初始値。 又，將反饋增益調整機構404之輸出信號，利用構 成積分機構之加算元件5 1 5到5 2 1進行加算所學習之濾 波器係數對各分接之濾波器係數進行輸出之方式，進行 濾波器係數之更新。 在此，延遲元件522到528，係分別將輸入信號與所 貧魅樂專 年 月」^_ 五、發明說明（8) 加算之濾波器係數時間加以調整之元件。又，控制信號 是將濾波器係數之初始値原原本本地加以輸出，或是將 所學習之濾波器係數加以輸出，分別控制選擇器540到 5 46(第2選擇器）而加以選擇之信號，例如，僅在學習之 最初，輸出濾波器係數之初始値，之後，輸出學習後之 濾波器係數，或是不學習而持續輸出濾波器係數之初始 値等進行前述控制。丨 a 1 bass 4 R 丨 Fifth, the description of the invention (6) 2 0 1. A circular filter 202 for smoothing the phase error signal output by the phase comparator 2 0 1 and an oscillator 203 for outputting a regenerated clock The composition. The phase synchronization loop mechanism 104 can control the phase of the regenerative clock output by the oscillator 203 and the phase of the clock component of the output signal of the AD converter in synchronization, thereby, the AD converter 103 The output signal can synchronize the reproduced signal reproduced by the reproduction mechanism 102 with the phase of the clock component included in the signal, and can be sampled into a multi-bit digital signal. The filter 105 is composed of a finite tap, such as a FIR filter (Finite Impulse response Filter). The equalization characteristic of this FIR filter is realized by changing the tap overlap coefficient (hereinafter referred to as the filter coefficient). For example, taking 7 tapped FIR filters as an example, as shown in Figure 3, the delay elements are used to delay the signal 3 1 to 3 0 6 and the multiplication elements 3 0 7 to 3 1 3, And the addition mechanism 3 1 4 constitutes. The filter coefficients S1 to S7 of the FIR filter are the filter coefficients obtained in the filter coefficient learning mechanism 106 by which the equalization error is minimized and appropriately controlled, so that the output signal of the AD converter can be Equalize appropriately. The aforementioned filter coefficient learning mechanism 106 learns the filter coefficients using the LMS calculation method (Least Mean Square) that minimizes the equalization error and appropriately controls, and passes the switching signal obtained by the switching signal generating mechanism 107 , The filter coefficient during the regeneration of the land part and the filter coefficient during the regeneration of the groove part are switched. V. Description of the invention (7) A mechanism for outputting a filter signal. The filter coefficient learning mechanism 106, as shown in FIG. 4, uses the output of the filter 105 as an input signal, and temporarily determines the mechanism 401 from which an equalization target is detected from the input signal. The equalization error detection mechanism 402 detects the equalization error in the input signal, the correlator 403 that calculates the correlation between the output signal of the equalization error detection mechanism 402 and the input signal, and the feedback of the output signal of the correlator 403 The feedback gain adjustment mechanism 404 for adjusting the gain, and the respective filter coefficient update mechanisms 405 that update the filter coefficients for the land portion and the groove portion respectively by switching the switching signals of the land portion and the groove portion. Made up. Here, the filter coefficient update mechanism 405 will be described in detail with reference to FIG. 5. In FIG. 5, registers 501 to 507 are registers for storing initial coefficients of filter coefficients for the land portion, and registers 508 to 514 are registers for storing initial coefficients of filter coefficients for the groove portion. . The initial value of the filter coefficient for the land portion and the groove portion is a switch signal for switching the land portion and the groove portion to the selectors 530 to 536 (the first selector), and the land portion and the groove are output through the switching signal. The initial value of the internal filter coefficients. In addition, the output signal of the feedback gain adjustment mechanism 404 is added to the filter coefficients of the taps by using the filter coefficients learned by adding elements 5 1 5 to 5 2 1 constituting the integrating mechanism to perform filtering. Update of coefficients. Here, the delay elements 522 to 528 are elements that adjust the input signal and the poor music year and year respectively. ^ _ 5. Description of the invention (8) The filter coefficient time added is adjusted. The control signal is a signal that outputs the initial filter coefficients locally or outputs the learned filter coefficients, and controls the selectors 540 to 5 46 (the second selector) to be selected, for example, The aforementioned control is performed only at the beginning of the learning, outputting the initial coefficient of the filter coefficients, and thereafter, outputting the learned filter coefficients, or continuously outputting the initial coefficients of the filter coefficients without learning.
切換信號產生機構1 07，乃是產生辨識陸地部再生時 與溝槽部再生時之切換信號之機構，例如，產生陸地部 再生時爲Hi而溝槽部再生時爲Low般之閘極信號之機 構。The switching signal generating mechanism 107 is a mechanism that generates a switching signal that discriminates between the land part regeneration and the groove part regeneration. For example, it generates a gate signal that is Hi when the land part is reproduced and Low when the groove part is reproduced. mechanism.
透過以上之構成，對於在陸地部再生時與溝槽部再 生時其再生信號特性之不同，由於係透過將分別適合之 濾波器係數加以收容之濾波器係數學習機構1 〇6，以及 將前述兩濾波器係數加以切換之切換信號產生機構1 〇7 之輸出，加以切換地進行輸出，所以能夠將隨時良好之 之濾波器係數設定於濾波器1 〇5，可提升等化信號之品 質。 (第2實施形態） 接下來，將相當於本發明之申請專利範圍5項所述 之光碟再生裝置作爲第2實施形態，利用第6圖到第8 圖加以說明。第6圖係說明構成第2實施形態所述之光 碟再生裝置之方塊圖，與第1圖相同符號處係代表與其 -10- 五、發明說明（9) 相同或是相當之部分，光碟再生裝置600,係與前述光 碟再生裝置1〇〇相同地，其特徵除了透過擁有分別對應 於將以陸地/溝槽紀錄方式之光碟加以再生所獲得之陸 地部以及溝槽部之再生信號之濾波器係數學習機構，利 用在陸地部以及溝槽部上隨時將良好之濾波器係數設定 於濾波器上之方式使等化信號之品質提昇之外，光碟再 生裝置600,具有利用附有維持機構之濾波器係數學習 機構606之點與第1實施形態不同。 附有維持機構之濾波器係數學習機構606，係如第7 圖所示般，備有維持濾波器係數數値之維持機構，備有 透過切換陸地部與溝槽部之切換信號，分別更新陸地用 與溝槽部用之濾波器係數後加以輸出之附有維持機構之 濾波器係數更新機構705。又，針對其他構成，與第4 圖相同符號處代表與其相同或是相當之部分。 在此，針對構成濾波器係數學習機構606之濾波器 係數更新機構 7〇5，利用第8圖加以說明。在第8圖 中，暫存器801到807爲記憶陸地部用濾波器係數之初 始値之暫存器，暫存器808到814爲記憶溝槽部用濾波 器係數之初始値之暫存器。又，維持暫存器829到835 爲維持陸地部用濾波器係數之暫存器，暫存器836到 842爲維持溝槽部用濾波器係數之暫存器。 控制信號2係輸入於選擇器850到856以及選擇器 860到8 66(第3選擇器），選擇前述一般之濾波器或是維 -11- 五、發明說明（1 0 ) 持用濾波器。透過所選擇之濾波器，輸出濾波器係數之 初始値或是學習後之濾波器係數。 接下來，透過切換陸地部與溝槽部之切換信號，控 制選擇器530到536，進行陸地部用之濾波器係數之輸 出，或者是進行溝槽部用之濾波器係數之輸出般地加以 切換。又，將反饋增益調整機構404之輸出信號.，利用 加算元件815到821進行加算所學習之濾波器係數對各 分接之濾波器係數進行輸出之方式，進行濾波器係數之 更新。 在此，延遲元件822到828，係分別將輸入信號與所 加算之濾波器係數時間加以調整之元件。又，控制信號 1是將在控制信號2所選擇之數値作爲濾波器係數加以 輸出，或是將所學習之濾波器係數加以輸出，控制選擇 器5 40到5 46而加以選擇之信號。 又，維持暫存器829到842乃是透過切換陸地部與 溝槽部之切換信號，在陸地部用之濾波器係數學習時將 濾波器係數陸地部用之維持於維持暫存器829到835， 在溝槽部用之濾波器係數學習時將濾波器係數維持於溝 槽用維持暫存器836到842。 由此，利用控制信號1與控制信號2以及切換陸地 部與溝槽部之切換信號，在陸地部再生時進行陸地部用 之濾波器係數之學習，陸地部用之維持暫存器829到 835會維持此時所學習之濾波器係數，接著在成爲溝槽 -12-With the above structure, the difference between the reproduction signal characteristics during the reproduction of the land portion and the reproduction of the groove portion is due to the filter coefficient learning mechanism 10 that accommodates appropriate filter coefficients, and the two The output of the switching signal generation mechanism 1 07 that switches the filter coefficients is switched to output, so that the filter coefficients that are always good can be set to the filter 105, which can improve the quality of the equalized signal. (Second Embodiment) Next, a disc reproduction device corresponding to the five items of the patent application scope of the present invention will be described as a second embodiment with reference to Figs. 6 to 8. Fig. 6 is a block diagram illustrating the optical disc reproduction device constituting the second embodiment, and the same symbols as in Fig. 1 represent the same or equivalent parts as those of -10- V. Invention Description (9). 600, which is the same as the aforementioned optical disc reproduction device 100, except that it has filter coefficients corresponding to the reproduction signals of the land portion and groove portion obtained by reproducing the disc in the land / groove recording method, respectively. The learning mechanism utilizes a method of setting good filter coefficients on the filter at any time on the land section and the groove section to improve the quality of the equalized signal. The optical disc reproduction device 600 includes a filter with a maintenance mechanism. The point of the coefficient learning mechanism 606 is different from that of the first embodiment. A filter coefficient learning mechanism 606 with a maintenance mechanism is provided as shown in FIG. 7. A maintenance mechanism for maintaining the number of filter coefficients is provided, and a land signal is updated by switching the land signal and the groove signal. A filter coefficient update mechanism 705 with a maintenance mechanism is output after applying the filter coefficients for the groove portion. For other structures, the same reference numerals as in FIG. 4 represent the same or corresponding parts. Here, the filter coefficient update means 705 constituting the filter coefficient learning means 606 will be described with reference to Fig. 8. In FIG. 8, registers 801 to 807 are registers for storing initial coefficients of filter coefficients for the land portion, and registers 808 to 814 are registers for storing initial coefficients of filter coefficients for the groove portion. . Further, the holding registers 829 to 835 are registers for maintaining the filter coefficients for the land portion, and the registers 836 to 842 are registers for maintaining the filter coefficients for the groove portion. The control signal 2 is input to the selectors 850 to 856 and the selectors 860 to 8 66 (the third selector), and selects the aforementioned general filter or dimension. -11- V. Description of the invention (1 0) Holding filter. Through the selected filter, the initial value of the filter coefficient or the filter coefficient after learning is output. Next, by switching the switching signal between the land portion and the groove portion, the selectors 530 to 536 are controlled to switch the output of the filter coefficients for the land portion or the filter coefficients for the groove portion. . In addition, the output signal of the feedback gain adjustment mechanism 404 is used to update the filter coefficients by using the filter coefficients learned by adding elements 815 to 821 to output the filter coefficients of each tap. Here, the delay elements 822 to 828 are components that adjust the input signal and the added filter coefficient time, respectively. The control signal 1 is a signal that outputs the number selected in the control signal 2 as a filter coefficient, or outputs the learned filter coefficient and controls the selectors 5 40 to 5 46 to select it. In addition, the maintenance registers 829 to 842 are used to switch the signal between the land portion and the groove portion, and the filter coefficients for the land portion are maintained in the maintenance registers 829 to 835 when the filter coefficients for the land portion are learned. During the learning of the filter coefficients for the groove part, the filter coefficients are maintained in the groove maintenance registers 836 to 842. Therefore, using the control signal 1 and the control signal 2 and the switching signal for switching the land portion and the groove portion, the filter coefficients for the land portion are learned during the regeneration of the land portion, and the maintenance registers 829 to 835 are used for the land portion. Will maintain the filter coefficients learned at this time, and then become the groove-12-
五、發明說明（11) 部再生時，前述維持於陸地部用之維持暫存器829到 8 3 5之濾波器係數會維持原狀不作更新，可作爲下一次 陸地部再生時之初始値加以利用。又，同樣地，在溝槽 部再生時進行陸地部用之濾波器係數之學習，在溝槽部 用之維持暫存器83 6到842會維持濾波器係數，接著， 在成爲陸地部再生時，前述維持於溝槽部用之維持暫存 器83 6到842之濾波器係數會維持原狀不作更新，可作 爲下一次溝槽部再生時之初始値加以利用。 如此，由本發明第2實施形態來看，在濾波器係數 學習機構606 ，新設置有維持陸地部用濾波器係數之維 持暫存器829到8 3 5，以及爲維持溝槽部用濾波器係數 之維持暫存器836到842，藉由透過控制信號2，利用 選擇器85 0到8 5 6以及選擇器860到866，選擇一般之 濾波器與維持用濾波器之任何一方之構成之方式，對於 在陸地部再生時與溝槽部再生時其再生信號特性之不 同，將前一次陸地部再生時與溝槽部再生時所學習之濾 波器係數作爲初始値進行濾波器係數的學習之故，所以 在切換陸地與溝槽後的瞬間能夠進行最佳之數位等化。 【發明之效果】 如以上所述般，由本發明所述之光碟再生裝置來 看，由於備有將紀錄於光碟之陸地部與溝槽部之資訊加 以再生之再生機構；可將濾波器係數變換成將由再生機 構所再生之再生信號透過類比•數位轉換器加以轉換所 -13- 五、發明說明（12) 獲得之多位元數位信號而進行數位等化之濾波器；辨識 陸地部與溝槽部而產生切換信號之切換信號產生機構； 將輸入於濾波器內之前述濾波器係數，分別就陸地部與 溝槽部其等化誤差成爲最小地適當地加以控制之濾波器 係數學習機構，所以透過陸地部與溝槽部分別所擁有之 濾波器係數學習機構，在陸地部與溝槽部，能夠將隨時 良好之濾波器係數設定於濾波器上，可獲得提高等化信 號之品質之效果。 又，本發明之申請專利範圍第2項所述之光碟再生 裝置，乃是在申請專利範圔第1項所述之光碟再生裝置 中，前述濾波器爲非巡迴形濾波器，且備有令透過前述 類比•數位轉換器所轉換後之多位元數位信號在每—— 定時間間隔加以延遲之複數個延遲元件；分別對應於前 述延遲元件分別加以設置，將前述多位元數位信號或者 是前述延遲元件之輸出作爲第1輸入，將此前述濾波器 係數學習機構所控制之濾波器係數作爲第2輸入，將第 1輸入與第2輸入加以乘算之乘算器·，以及將前述負數 個乘算器之輸出加以加算之加算機構，所以透過陸地部 與溝槽部分別所擁有之濾波器係數學習機構，在陸地部 與溝槽部方面，能夠將隨時良好之濾波器係數設定於濾 波器上’可獲得提高等化信號之品質之效果。 又’本發明申請專利範圍第3項所述之光碟再生裝 置’乃是在申請專利範圍第1項所述之光碟再生裝置 -14- 五、發明說明 (13) 中 刖 述 濾 波 器係 數 學 習 機 構 係 備 有 設 定 由前 述 濾 波 器 之 輸 出 信 號 之等 化 巨 標 値 之 暫 時 判 定 機 構 ;檢 測 出 由 以 前 述 暫 時判 定機 構 所 設 定 之 等 化 g 標 値 與 前述 濾 波 器 之 輸 出 信 號 之 等化 誤 差 之 等 化 誤 差 檢 測 機 構 ;將 由 刖 述 等 化 誤 差 檢 測 機構 所 獲 得 之 等 化 誤 差 與 刖 述 濾波 器 之 輸 出 信 號 之 相 關 加以 演 算 之 相 關 器 將 作 爲 刖 述相 關 器 之 輸 出 之 反 饋 增 益加以 調 整 之反 饋 增 益 調 整 機 構； 以 及利 用 刖 述反 饋 增 益調 整 機 構 之 輸 出 信 號 與 由 刖 述切 換 信 號 機 構 所 產 生 之 切換 信 號 將 分別 對 應 於前述 陸地部與 溝 槽 部 之 濾 波 器 係數 加 以 更 新而 輸 出 之 濾 波 器 係數 更 新 機 構 所以 透 過 陸地部 與 溝 槽 部分別所 擁 有 之 濾波 器 係 數 學 習 機 構 在 陸地 部 與 溝 槽 部 能 夠 將 隨 時 良好 之 濾 波 器 係 數 設 定 於 濾波 器 上 5 可 獲 得 提 1¾ 等 化 信 號之 品 質 之 效 果 Ο 本發Φ 目申請專利範圍第 4 項 所述 之 光 碟 再生 裝 置 > 乃 是 在 串 請 專 利範 圍 第 3 項 所述之光 碟 再 生 裝置 中 Ί 刖 述 濾 波 器 係 數 更新 機 構 係 備 有 收 容 陸 地 部 用 、溝 槽 部 用 之 初 始 値 且 針 •對濾波器係數所加以設置; 之: 複數 個 暫 存 器 f 分別 對 應 於前 述 複 數 個 暫 存 器 而加以 設 置， 將 此 暫 存 器 之 輸 出切 換成 由 刖 述 切 換 信 號 產 生 機 構 所產 生 之 切 換 信 號 而 選 擇陸 地 部 用 或 是 溝 槽 部用 之 初始値 之 第 1 •ΪΒΒ m 擇 器 J 針 對 濾波 器 係 數 所加 以 設 置 之 將 -XJU 刖 述反 A由- 饋 增 益 調 整 機 構 之 輸 出信 號 加以 積 分 之 積 分 機 構 J 以及針 對 濾 - 15 -V. Description of the invention (11) During regeneration, the filter coefficients of the above-mentioned maintenance registers 829 to 835 used in the land department will be maintained as they are and will not be updated, and can be used as the initial time for the next land department regeneration. . Also, similarly, the filter coefficients for the land section are learned during the regeneration of the groove section. The retention registers 836 to 842 for the groove section maintain the filter coefficients. Then, when the regeneration is performed for the land section, the filter coefficients are maintained. The filter coefficients of the aforementioned maintenance registers 836 to 842 used for maintaining the groove part will be maintained as they are and will not be updated, and can be used as an initial value for the next regeneration of the groove part. As described above, from the second embodiment of the present invention, the filter coefficient learning mechanism 606 is newly provided with maintenance registers 829 to 8 3 5 for maintaining filter coefficients for the land portion, and filter coefficients for maintaining the groove portion. The maintenance registers 836 to 842 use the control signal 2 to select either one of a general filter and a maintenance filter using selectors 85 0 to 8 5 6 and selectors 860 to 866. Regarding the difference in the reproduction signal characteristics between the land part regeneration and the groove part regeneration, the filter coefficients learned during the previous land part regeneration and the groove part regeneration are used as the initial value to learn the filter coefficients. Therefore, the best digital equalization can be performed immediately after switching between land and trench. [Effects of the Invention] As described above, from the perspective of the optical disc reproduction device of the present invention, since a reproduction mechanism for reproducing information recorded on the land portion and groove portion of the optical disc is provided, the filter coefficients can be converted A filter that converts the reproduced signal reproduced by the reproduction mechanism through an analogue / digital converter. Ⅴ. Description of the invention (12) A digital equalization filter for the multi-bit digital signal obtained; identify the land and groove A switching signal generation mechanism that generates a switching signal; a filter coefficient learning mechanism that appropriately controls the aforementioned filter coefficients input into the filter with respect to the equalization error of the land portion and the groove portion, so that Through the filter coefficient learning mechanism respectively possessed by the land portion and the groove portion, in the land portion and the groove portion, it is possible to set good filter coefficients on the filter at any time, and the effect of improving the quality of the equalized signal can be obtained. In addition, the optical disc reproduction device described in item 2 of the scope of patent application of the present invention is the optical disc reproduction device described in item 1 of the patent application, wherein the aforementioned filter is a non-touring filter, and an order is provided. The multi-bit digital signal converted by the aforementioned analog-to-digital converter is delayed by a plurality of delay elements at regular intervals; the corresponding delay elements are respectively set to set the aforementioned multi-bit digital signal or The output of the delay element is used as a first input, the filter coefficient controlled by the filter coefficient learning mechanism is used as a second input, a multiplier that multiplies the first input and the second input, and the negative number The addition mechanism of the multiplier output is added, so through the filter coefficient learning mechanism owned by the land section and the groove section, the land section and the groove section can set good filter coefficients to the filter at any time. You can get the effect of improving the quality of the equalized signal. The 'disc reproduction device described in item 3 of the scope of patent application of the present invention' is a disc reproduction device described in item 1 of the scope of patent application. 14- 5. The description of the filter coefficient learning mechanism in the description of the invention (13) Equipped with a temporary judging mechanism that sets the equalization giant standard output signal of the aforementioned filter; and detects an equalization error between the equalized g flag set by the aforementioned temporary judging mechanism and the equalization error of the output signal of the aforementioned filter Equalization error detection mechanism; a correlator that calculates the correlation between the equalization error obtained by the narrative equalization error detection mechanism and the output signal of the narrative filter will be used as a feedback to adjust the feedback gain of the output of the narrative correlator. The gain adjustment mechanism; and the output signal of the feedback gain adjustment mechanism and the switching signal generated by the switching signal mechanism will correspond to the aforementioned land portion and The filter coefficient update mechanism that outputs the filter coefficients of the groove part is updated. Therefore, the filter coefficient learning mechanism owned by the land part and the groove part can set the filter coefficients that are good at any time in the land part and the groove part. 5 on the filter can obtain the effect of improving the quality of the 1¾ equalized signal. 0 The optical disc reproduction device described in item 4 of the patent application scope of the present invention is an optical disc reproduction device described in item 3 of the patent scope. In the above description, the filter coefficient update mechanism is provided with an initial frame for receiving the land portion and the groove portion, and the filter coefficients are set; of: the plurality of temporary registers f respectively correspond to the aforementioned plurality of temporary registers. The register is set, and the output of this register is switched to the switching signal generated by the switching signal generating mechanism described above, and the land portion or the groove portion is selected. The first of the initial 値 Βm m selector J is added to the filter coefficient to set the -XJU description inverse A by-feed gain adjust the output signal of the adjustment mechanism to integrate the integral mechanism J and the filter-15-
fiM 月曰 五、發明說明（14) 波器係數所加以設置而選擇前述積分機構之輸出與前述 第1選擇器之輸出的任何一個，作爲濾波器係數加以輸 出之第2選擇器，所以透過陸地部與溝槽部分別所擁有 之濾波器係數學習機構，在陸地部與溝槽部，能夠將隨 時良好之濾波器係數設定於濾波器上，可獲得提高等化 信號之品質之效果。 本發明申請專利範圍第5項所述之光碟再生裝置， 乃是在申請專利範圍第4項所述之光碟再生裝置中，具 備有：與前述暫存器成對地加以設置將前述可將個別之 數値加以維持之維持暫存器與；與將設置於該對暫存器 之維持暫存器之輸出與一般暫存器之輸出作爲輸入，透 過切換信號令任何一方之暫存器之信號受到輸出般地進 行輸出選擇之第3選擇器，所以能夠將前一次陸地部再 生時與溝槽部再生時所學習之濾波器係數作爲初始値進 行濾波器係數的學習，可獲得在切換陸地與溝槽後的瞬 間進行最佳之數位等化之效果。 【圖式之簡單說明】 第1圖係說明本發明之第1實施形態所述之光碟再生裝 置之構成之區塊圖。 第2圖係說明構成前述光碟再生裝置之相位同步循環機 構之構成之區塊圖。 第3圖係說明構成前述光碟再生裝置之FIR濾波器之構 成之區塊圖。 -16- 五、發明說明（彳5) 第4圖係說明構成前述光碟再生裝置之濾波器係數學習 機構之詳細構成之區塊圖。 第5圖係說明構成前述光碟再生裝置之濾波器係數更新 機構之構成之區塊圖。 第6圖係說明本發明之第2實施形態所述之光碟再生裝 置之構成之區塊圖。 第7圖係說明本發明之第2實施形態所述光碟再生裝置 之濾波器係數學習機構之詳細構成之區塊圖。 第8圖係說明本發明之第2實施形態所述光碟再生裝置 之濾波器係數更新機構之構成之區塊圖。 第9圖係說明習知之光碟再生裝置之問題點用之光碟紀 錄領域之示意圖。 【元件編號之說明】 1〇〇.........光碟再生裝置 101 .........光碟 102 .........再生機構 103 .........AD轉換器 104 .........相位同步循環機構 1 05.........濾、波器 1 06.........減波器係數學習機構 107.........濾波器係數更新機構 201 .........相位比較器 202 .........循環濾波器 -17- 人 ίί 〇 ί' 年: 五、發明說明（16) 203 ........ •振盪器 301 〜306·· •延遲元件 307 〜313·· •乘算元件 3 14........ •加算機構 Q 1 .····· ·· •暫時判定機構 402 ........ •等化誤差檢測機構 403 ........ •相關器 404........ •反饋增益調整機構 405 ........ •濾波器係數更新機構 50 1〜507,829〜83 5…陸地部用濾波器係數初始値記憶暫 存器 5 0 8〜5 1 4,8 3 6〜842…溝槽部用濾波器係數初始値記憶暫 存器 515〜521，815〜821···加算元件 522〜528,822〜828…延遲元件 5 3 0 〜536·· •第1選擇器 540 〜546·· •第2選擇器 600......... •光碟再生裝置 606··· “· ·· •附有維持機構之濾波器係數學習機構 705 ......... •附有維持機構之濾波器係數更新機構 801 〜807·· •陸地部用濾波器係數初始値記億暫存器 808 〜814.· •溝槽部用濾波器係數初始値記憶暫存器 850〜856,860〜866···第3選擇器 -18- 五、發明說明（17) 9 0 0 .........光學紀錄領域 901 .........陸地 902 .........溝槽 -19-fiM Month, fifth, description of the invention (14) The wave filter coefficients are set and any one of the output of the aforementioned integration mechanism and the output of the aforementioned first selector is selected as the second selector for outputting the filter coefficients. The filter coefficient learning mechanism owned by each of the channel unit and the groove unit can set good filter coefficients on the filter at any time in the land unit and the groove unit, and can obtain the effect of improving the quality of the equalized signal. The optical disc reproduction device described in item 5 of the scope of patent application of the present invention is the optical disc reproduction device described in item 4 of the scope of patent application, which is provided with: set in pairs with the aforementioned register, The number of registers to be maintained and the registers to be maintained; and the output of the maintenance register and the general register that are set in the pair of registers as inputs, and the signal of any one of the registers is switched by a switching signal The third selector receives the output selection like an output, so the filter coefficients learned during the previous land regeneration and the groove regeneration can be used as the initial filter coefficients to learn the filter coefficients. The best digital equalization effect is performed immediately after the groove. [Brief description of the drawings] Fig. 1 is a block diagram illustrating the structure of the optical disc reproduction device according to the first embodiment of the present invention. Fig. 2 is a block diagram illustrating a configuration of a phase synchronization cycle mechanism constituting the foregoing optical disc reproduction device. Fig. 3 is a block diagram illustrating the structure of the FIR filter constituting the foregoing optical disc reproduction device. -16- V. Description of the Invention (彳 5) Figure 4 is a block diagram illustrating the detailed structure of the filter coefficient learning mechanism constituting the aforementioned optical disc reproduction device. Fig. 5 is a block diagram illustrating the structure of a filter coefficient updating mechanism constituting the aforementioned optical disc reproduction device. Fig. 6 is a block diagram illustrating the structure of an optical disc reproduction apparatus according to a second embodiment of the present invention. Fig. 7 is a block diagram illustrating a detailed structure of a filter coefficient learning mechanism of the optical disc reproduction device according to the second embodiment of the present invention. Fig. 8 is a block diagram illustrating the structure of a filter coefficient updating mechanism of the optical disc reproduction device according to the second embodiment of the present invention. Fig. 9 is a schematic diagram illustrating a disc recording field used in a conventional disc reproduction apparatus. [Explanation of component number] 100 ......... Disc reproduction device 101 ......... Disc 102 ......... Reproduction mechanism 103 ..... .... AD converter 104 ......... phase synchronous loop mechanism 1 05 ......... filter, wave filter 1 06 ......... wave reducer Coefficient learning mechanism 107 ......... Filter coefficient update mechanism 201 ......... Phase comparator 202 ......... Circulating filter-17- 人 ίί 〇 ί 'year: V. Description of the invention (16) 203 ......... • Oscillators 301 to 306 ·· • Delay elements 307 to 313 ·· • Multiplication element 3 14 ........ • Addition mechanism Q 1 .............. Temporary determination mechanism 402 ........ • Equalization error detection mechanism 403 ........ • Correlator 404 ..... ... • Feedback gain adjustment mechanism 405 ..... • Filter coefficient update mechanism 50 1 to 507, 829 to 83 5 ... Filter coefficient initial 値 memory register for land part 5 0 8 to 5 1 4 , 8 3 6 to 842 ... Filter coefficient initial 値 memory register for groove part 515 to 521, 815 to 821 ... Adding element 522 to 528, 822 to 828 ... Delay element 5 3 0 to 536 ... Selector 540 to 546 ... • Second selector 600 ......... • Disc reproduction device 606 ······· Filter coefficient learning mechanism 705 with maintenance mechanism ............ Filter coefficient update mechanism 801 to 807 with maintenance mechanism • Initial filter coefficients for land section are recorded in 100 million registers 808 to 814. • Initial filter coefficients for groove section are stored in register 850 to 856,860 ~ 866 ··· 3rd selector -18- V. Description of the invention (17) 9 0 0 ......... Field of optical recording 901 ......... Land 902 .... ..... groove-19-
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| JPH1116279A (en) * | 1997-06-23 | 1999-01-22 | Matsushita Electric Ind Co Ltd | Optical disk device |
| KR100300998B1 (en) * | 1998-04-17 | 2001-09-06 | 윤종용 | Method and device for generating land/groove switching signal |
| JP2999759B1 (en) | 1998-10-13 | 2000-01-17 | 松下電器産業株式会社 | Digital playback signal processor |
| KR20000034470A (en) * | 1998-11-30 | 2000-06-26 | 전주범 | Adaptive equalizer of a dvd reproducing apparatus |
| JP3611472B2 (en) * | 1999-02-02 | 2005-01-19 | 松下電器産業株式会社 | Adaptive equalization circuit |
| JP2000311442A (en) * | 1999-02-26 | 2000-11-07 | Matsushita Electric Ind Co Ltd | Adaptive equalizing circuit and digital information reproducing device |
| US6724706B1 (en) * | 1999-02-26 | 2004-04-20 | Matsushita Electric Industrial Co., Ltd. | Digital adaptive equalizer for different quality signals |
| JP3548057B2 (en) * | 1999-08-31 | 2004-07-28 | 三洋電機株式会社 | Recording / reproducing method and recording / reproducing apparatus |
| JP2002008315A (en) * | 2000-06-22 | 2002-01-11 | Matsushita Electric Ind Co Ltd | Optical disk device |
| JP2002197666A (en) * | 2000-12-28 | 2002-07-12 | Victor Co Of Japan Ltd | Recording information reproducing device |
-
2001
- 2001-07-18 JP JP2001217499A patent/JP2003030848A/en active Pending
-
2002
- 2002-07-11 TW TW091115425A patent/TWI231934B/en not_active IP Right Cessation
- 2002-07-16 KR KR10-2002-0041501A patent/KR100537238B1/en not_active IP Right Cessation
- 2002-07-17 US US10/196,381 patent/US6999394B2/en not_active Expired - Fee Related
- 2002-07-18 CN CNB021261865A patent/CN1182519C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030009165A (en) | 2003-01-29 |
| US20030016606A1 (en) | 2003-01-23 |
| CN1182519C (en) | 2004-12-29 |
| CN1397935A (en) | 2003-02-19 |
| KR100537238B1 (en) | 2005-12-19 |
| JP2003030848A (en) | 2003-01-31 |
| US6999394B2 (en) | 2006-02-14 |
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| MM4A | Annulment or lapse of patent due to non-payment of fees |